Electrogenerated Chemiluminescence and Electroluminescence of N‐Doped Graphene Quantum Dots Fabricated from an Electrochemical Exfoliation Process in Nitrogen‐Containing Electrolytes. Issue 68 (6th October 2020)

• Record Type: Journal Article
• Authors: Chu, Kenneth; Adsetts, Jonathan R.; He, Shuijian; Zhan, Ziying; Yang, Liuqing; Wong, Jonathan M.; Love, David A.; Ding, Zhifeng
• Is Part Of: Chemistry. Volume 26:Issue 68(2020)
• Page Start: 15892
• Page End: 15900
• Publication Date: 2020-10-06
• Subjects: electrochemical exfoliation -- electrogenerated chemiluminescence -- electroluminescence -- graphene quantum dots -- white light-emitting electrochemical cells; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202003395
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Artificial lighting sources are one of the most important technological developments for our modern lives; the search for cost‐effective and efficient luminophores is therefore crucial to a sustainable future. Graphene quantum dots (GQDs) are carbon‐based nanomaterials that exhibit exceptional optical and electronic properties, making them a prime candidate for a luminophore in a light‐emitting device. Nitrogen‐doped GQDs fabricated from a facile top‐down electrochemical exfoliation process with a nitrogen‐containing electrolyte in this report showed strong photoluminescent emission at 450 nm, and electrogenerated chemiluminescence at 660 nm in the presence of benzoyl peroxide as a coreactant. When introduced into solid‐state light‐emitting electrochemical cells, for the first time, the GQDs displayed a broad white emission centered at 610 nm, corresponding to Commision Internationale de l'eclairage (CIE) colour coordinates of (0.38, 0.36). Abstract : Graphene quantum dots (GQDs) fabricated from a facile top‐down electrochemical exfoliation process in this report showed strong photoluminescent emission at 450 nm, and electrogenerated chemiluminescence at 660 nm in the presence of BPO as a coreactant. When introduced into solid‐state light‐emitting electrochemical cells, for the first time, the GQDs displayed a broad white emission centered at 610 nm.